Dhanin Chearavanont, chairman of the Charoen Pokphand Group, is Thailand's richest person and 133rd richest person in the world, according to Forbes magazine's annual list of the world's richest billionaires.
The CP chief and his family had a net worth of US$7 billion. Mr Dhanin, head of the country's biggest agribusiness conglomerate, was ranked 153rd last year.
The second richest person in Thailand is TCC Holding chairman and liquor tycoon Charoen Sirivadhanabhakdi, with $5.5 billion. Mr Charoen's ranking went up from 247th to 184th.
Red Bull co-founder Chaleo Yoovidhya is the third wealthiest person in Thailand and ranks 205th on the list of the world's richest billionaires, with $5 billion. He was in 208th spot in 2011.
Mexican telecommunications tycoon Carlos Slim is the world's richest man for the third year in a row. His net worth is estimated at $69 billion by Forbes magazine.
Former Microsoft CEO Bill Gates is runner-up, with $61 billion, followed by billionaire investor Warren Buffet, with $44 billion.
Forbes' list of worldwide billionaires can be found at http://www.forbes.com/billionaires/.
From left: Dhanin Chearavanont, Charoen Sirivadhanabhakdi and Chaleo Yoovidhya